2016 Fiscal Year Final Research Report
Spintronics with superconductivity
| Project/Area Number |
25247051
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| Research Category |
Grant-in-Aid for Scientific Research (A)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Condensed matter physics I
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| Research Institution | The University of Tokyo |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
橋本 義昭 東京大学, 物性研究所, その他 (20396922)
中村 壮智 東京大学, 物性研究所, 助教 (50636503)
陽 完治 北海道大学, 学内共同利用施設等, 教授 (60220539)
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| Project Period (FY) |
2013-04-01 – 2016-03-31
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| Keywords | スピントロニクス / 超伝導トランジスタ / 希薄磁性半導体 / 超伝導近接効果 |
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| Outline of Final Research Achievements |
We found switching of supercurrent through two-dimensional electron gas (2DEG) with the spin-Hall effect. The transition from 0-junction to pi-junction in such a superconducting junction was found due to a trapping of magnetic flux in superconducting electrodes was also found. We succeeded in making an n-type diluted ferromagnetic semiconductor (In,Fe)As superconducting with proximity effect and found the pairing is probably spin-triplet.
We confirmed experimentally for the first time that through a quantum point contact with strong spin-orbit interaction spins are highly polarized particularly on the plateau with single conductance quantum.
With this technique, we found that so called "Zitterbewegung" phenomenon, which is characteristic in relativistic electrons, appears as reproducible conductance fluctuation versus in-plane magnetic field in spin-polarized transport.
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| Free Research Field |
量子物性物理学
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